title: catena-Poly[ammonium [aqua-bis-(μ-2,3,5,6-tetra-oxo-4-nitro-pyridin-4-ido)argentate(I)]].
abstract: In the title compound, {(NH4)[Ag(C5HN2O6)2(H2O)]} n , the Ag(I) cation is seven-coordinated and is surrounded by four oxo O atoms of the 2,3,5,6-tetra-oxo-4-nitro-pyridin-4-ide species [Ag-O = 2.3848 (19), 2.4931 (18), 2.5361 (18) and 2.573 (2) Å], two nitro O atoms [Ag-O = 2.644 (2) and 2.661 (2) Å], and one water mol-ecule [Ag-O = 2.3133 (19) Å]. The pyridin-4-ide mono-anions act as polydentate bridging ligands and form a three-dimensional network that is stabilized through O-H⋯O and N-H⋯O hydrogen bonds involving the coordinating water mol-ecule and the imide function as donator groups. The ammonium cations are located in the cavities of the framework and are also involved in hydrogen bonding to O atoms of the ligand.
authors.affiliation: Hanoi University of Mining and Geology, Dong Ngac, Tu Liem, Ha Noi, Vietnam.
authors.forename: Nguyen
authors.initials: N
authors.lastname: Dinh Do
authors.forename: Olga
authors.initials: O
authors.lastname: Kovalchukova
authors.forename: Adam
authors.initials: A
authors.lastname: Stash
authors.forename: Svetlana
authors.initials: S
authors.lastname: Strashnova